/*
 * Copyright 2016, The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.tys.daggermvp.mvp.base;

import android.support.annotation.Nullable;

import java.lang.ref.WeakReference;

/**
 * @author tys
 */
public abstract class BasePresenter<V extends BaseView, D extends BaseModule> {

    @Nullable
    protected WeakReference<V> mViewWeakRef = null;

    @Nullable
    protected D mData = null;


    /**
     * Binds presenter with a view when resumed. The Presenter will perform initialization here.
     *
     * @param view the view associated with this presenter
     */
    public void takeView(V view) {
        mViewWeakRef = new WeakReference<>(view);
    }

    /**
     * Drops the reference to the view when destroyed
     */
    public void dropView() {
        if (mViewWeakRef != null) {
            mViewWeakRef.clear();
        }
    }

    public void takeData(D data) {
        mData = data;
    }

    public void dropData() {
        mData = null;
    }

    public void drop() {
        dropView();
        dropData();
    }
}
